What Is the Functionality of Map Function in JavaScript?

creates a new array from calling a function for every array element.

map() is a method of the Array object. It creates a new array by calling a function on every element of the original array and storing the results in a new array. map() returns the new array, and the original array is unchanged.

The 'map()' function applies a function to each element of an existing array and returns a new array.